We shouldn't assume that all gulfy looking, dishdash wearing, land cruiser driving males are Qatari, a lot of them are not, the native Qatari's that I've met are usually polite and helpful.
It's too easy for one to judge with one's standards at the end of the day. You never hear any racists slurs in Qatari stadiums, although most criminal activity is not reported in Qatar the rate is still one of the lowest in the world and if anyone is really concerned about the road rage in the country it's a good thing to write to the ministry of interior and complain, if we all started doing that, without getting too political, I'm sure changes will happen as they always do when it's in the public's interest.